Yarn-sinking mechanism for knitting machines



Feb. 20, 1923.

K. HOWIE ET AL YARN SINKING MECHANISM FOR KNITTING MACHINES.

ORIGINAL FILED FEB. 2|, 1920. 2 SHEETSfSHEET l.

II I

K. HOW!E ET AL YARN SINKING MECHANISM FOP. KNITTING MACHINES.

ORIGINAL FILED FEB 2| I920. 2 SHE 'S-SHEET 2.

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KENNJETI-IOEIOWIE, OJE NORRIS'IOWN, AND WILLIANE O. TAYLOR, OF LIMERICK, PENN- SYLVANIA, ASSIGNOIES TO WILDIIIAN MFG. GO., 015 NORRISTOWN, PENNSYLVANIA,

A CORPORATION OF PENNSYLVANIA.

YARN-SINKING MECHANISM FOR KNITTING MACHINES.

Original application filed February 21, 1920, Serial No. 360,t4=0. Divided and this application filed August Serial No. 490,649.

. To all whom it may concern:

Be it known that we, KENNETH HOWIE and VILLIAM 0. TAYLOR, citizens of the United States, and residents of Norristown and Limerick, respectively, in the county of Montgomery and State of Pennsylvania, have invented certain new and useful Improvements in Yarn-Sinking Mechanism for Knitting Machines, of which the following is a' specification. A

"This specification is a division of that filed by us Feb. 21, 1920, No. 360,440.

The invention concerns means for deflecting the needles outwardly at the position where yarn sinking is done, so as to secure uniformity of the loop lengths measured off despite the fact that some of the needles may be bent or out of true position, and also to divide up the initial sinking movement between the sinkers and the needles.

In the drawings Figure 1 is a-vertical sectional view taken radially of the machine, some of the parts being shown in elevation.

Fig. 2 is a front View looking from the center of the machine radially outwards, showing the yarn guide'and some of the web holders or sinkers.

F ig. 3 is an enlarged view of the end of the yarn guide and a portion of a combined web holder and sinker.

Fig. 4c is a plan of a part of the needle and sinker circle.

Fig. 5 is a detail view showing the needle deflecting cam.

In these drawings 1 is the needle cylinder which in the present illustration is the rotating partand 2 is the cylinder cam ring. The spring beard needles are shown at a, there being a single row of these. 4 is the sinker ring which is mounted on the needle cylinder and carries radially slidable sinkers 5, which also perform the function of web A holders, being constructed for this two'fold purpose with a yarn engaging and sinking nose 6 and a web engaging and holding throat 7.

Individual needle beard pressers are shown at 8, held in place by a spring band 9 engaging their notches 10 so that the pressers can have rocking movement to advance to and retract from pressing position.

The thread guide consists of a sheet metal member 40 bent back upon itself with a space arm. Pressure exerted upon the arm suf ficient to overcome the holding force of the spring pin will throw the arm with its yarn guide backward and lift the yarn guide 41 from its yarn feeding position, shown in Fig. 2. It will be noticed that the end of the yarn. guide when in normal position, is in the same horizontal plane in which the sinkers are arranged, but as shown in the plan view, Fig. 4, when the sinkers arrive at the position where the yarn guide is located, they are retracted as indicated by the sinker wave, 8, s, in said Fig. 4;, so as to pass outside of the said guide after which the sinkers are advanced as at s to sink the yarn between the needles.

The relation of the yarn guide, (when in operative position) to the sinkers is shown in Figs. 1, 2 and 3. The two yarns are kept widely separated as they emerge from the yarn guide arm and thus they will be positioned in definite relation in the recess of the sinker nose, as indicated in Fig. 3. The yarn guide reaches down to a point where the upper yarn feeds at a slight angle downwardly to the sinker nose. :The sinker noseis blunt and provided with a shallow recess. No

special reliance is placed on the incline of the sinker nose to catch and direct the yarn down to the bottom of the recess in the nose because the yarn feed finger positions the yarn at about the level of the said sinker recess. By reason of thisthe length of stroke of the sinker is kept at a minimum. As shown in Fig. 1, theyarn guide is arranged at a slight inclination so that its lower end will be positioned close to the stem of the needle.

IFe Inayemploy a needle deflecting cam 48 to engage the backs of the needles, Figs.

4 and 5, and press them slightly outward. This cam will true up any bent needles. It

will also compensate for any irregularities in the needle cylinder by causing the needles to move in a definite path at the point where the yarn is being fed thereto and is being measured 0d by the sinkers across the needle stems.

This cam will divide the amount of sinking movement between the sinkers and the needles and we are thus enabled to employ a low angle cam for advancing the sinkers which do not have to be moved so far forward as would be the case were the needles not'made to take upon themselves a portion of this yarn measuring duty. Furthermore,

the loop lengths are uniform.

When the needle is deflected outwardly for the measuring action, referred to above, the sinkers advance between the needles and measure off the loop lengths across the stems of these deflected needles. Then, as the needles go back to normal position, the sinkers follow them up so as to maintain control of the measured loop lengths until they are taken by the hook of the needle.

Features not claimed herein have been fmade the subject of other applications which also are divisions of the application above mentioned and respectively numbered 490,647 and 490,648, filed Aug. 8, 1921.

, /Ve claim:

1. In combination in a knitting machine, needles, cams for operating the needles, sinkers operating between the needles to measure off the yarn for the loop lengths, cams for operating the sinkers. and a needle deflecting cam arranged adjacent the point where the sinkers operate between the needles, said cam serving to detleet the needles forwardly at the yarn sinking point to thus divide up the amount of movement a for the yarn sinking action between the sinkers and the needles, the sinkers tollowing up the movement of the detlected needles back to the needle circle. substantially as described.

2. In combination in a knitting maehine, spring beard needles, cams tor operating the needles, sinkers operating between the needles to measure oil' the yarn tor the loop lengths, cams for operating the sinliei's a. needle deflecting cam arranged adjacent; the point where the sinkers operate between the needles, said cam serving to delieet the needles forwardly at the yarn sinking point to thus divide up the amount of movement for the yarn sinking action between the sinkers and the needles, the sinkers t'ollowed up the movement of the detleeted needles back to the needle circle, and beard pressers individually movable to perform their beard pressing actions, substantially as described.

lln testimony whereof, we atlix our signatures.

KENNETH l*l( )W l l). WILLIAM O. TAYLOR. 

